Across
- 3. scientist who discovered the atom's nucleus
- 7. information collected directly with the senses
- 9. how the periodic table was originally arranged
- 12. group name of elements with 7 valence electrons
- 13. number of letters NOT on the periodic table
- 15. most important personal protective equipment
- 16. "You must be able to tell any 2 electrons apart!"
- 19. elements that are NOT filling their valence energy level
- 20. technology used in nuclear power plants
- 21. Alkaline earth metal with 4 total energy level
- 23. vertical column on the periodic table
- 24. figured out that electrons lived in specific energy levels
Down
- 1. molecular shape of carbon dioxide
- 2. number of nonmetals with a 1 letter atomic symbol
- 4. measures mass in the lab
- 5. elements found on the stair step line
- 6. ion with a positive charge
- 8. element found in pencils and diamonds
- 10. number of particles in 1 mole
- 11. type of bond formed between sodium and chlorine
- 14. one intensive property
- 17. alkali metal with a 1 letter atomic symbol
- 18. inversely related to frequency
- 22. only metal that is liquid at room temperature